Mining machine



1,597,923 v R. PEALE MINING MACHINE Filed June 23,- 1920 Ava 31,1926.`

6 Sheets-Sheet l V Vw. VS @mi J Hj ATTORNEY Aug."31 1926.l I 1,597,923

. r* R.PEALE MINING MACHINE Filed June 2s, 1920 e sheets-sheet 4 I l WW1/111.

f l ENTORl @Lf/t@ ATT RNEY .R. PEALE MINING MACHINE Filed June 25x," 14920 Ausf 31 6 Sheets-Speelt 5 m.: OQ

Patented Aug. 31, 1926.

RCHARD FEALE, OF ST. BENEDGT, BEITNSYLVNA, ASSIGNOR TO REMBRANDT MNING M'ACI-IVINE.

Application filed. Tune 23. 1920. Serial No. 391,103.

The invention relates to mining machines, and in certain its aspects it relates more particularly to novel driving or propelling and actuating mechanisms for the kerf cutting mechanism of machines of the rotary cutter bar type.

Objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom, ormay be learned by practice withrthe invention; the same being realized and attained by means of instrumentalities and combinations pointed out in the appended claims.

The invention' consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and constituting a part hereof, illustrate one embodiment of the invention, and together -with the description, serve to eX- plain the principles of the invention.

Of the drawings -V Fig. 1 is a top plan of a machine embodying the invention;

Fig. 2 is an end elevation, looking at Fig. 1 from the foot, that is, the right hand side 'of the sheet;

Fig. 3 is a side elevation, looking at Fig. 1 from the right, that is, from the top of the sheet, and showing the machine in one operating position in a coal seam;

Fig. fl isa horizontal section, looking downwardly, taken on line 4 4; of Fig. 2;

Fig. 5 is an enlarged, fragmentary, sectional, detail, `in elevation, taken on line of Fig. l, with certain parts in elevation, showing the cutter drive and one of the winding or snubbing drums for advancing the entire machine;

Fig. 6 is an enlarged, fragmentary sectional deta'il, inelevation, taken on line 6-6 of Fig.y 1, showing a detail' of part of the mechanism for advancing the cutter bar;

Fig. 7 is an enlarged,fragmentary, sectional detaihin elevation, taken' on line 77 of Fig. l, looking in the vdirection of the arrows; j Fig. 8 is enlarged, fragmentary, sectional Adetaihin elevation, taken online 8-8 of Fig.' 1, looking in the direction lof the arrows;

Fig. 9 is a greatly enlarged, sectional detailffin elevation, taken online 9.1-9 of Fig.

2, lookingV inA the direction of the arrows, showing the traveling and guiding means and the rotating means for the yrotary cutter bar;

Fig. 10 is a section taken on line 10-10 of Fig. 9, looking in the direction of the arrows; i

Fig. 11 is an enlarged, sectional detail, in elevation, taken ron line' 11-11 of Fig. 4, looking in the direction of the arrows and showing the drive for the longitudinal conveyor; Y l i 1 Fig. 12 is a vertical, transverse section through the machine, made somewhat diagrammaticfor the sake of clearness, taken substantially on line 12--12 of Fig. 1, showing the devices for rotating the cutter bar as it travels;

Fig. 13 is a vertical, transverse sectionl through the machine, also' made somewhat diagrammatic for the sake of clearness, taken substantially on line 132-413 of Fig. 1, just within 12-'-12, and showing themeans for guiding and progressing the cutter bar along its path; and

Fig. 14 is a diagrammatic plan view, showing one mannerjof applying the machine to the work.

The exemplified embodiment of the invention includes cooperating means or devices for imparting a traveling or advancing or feeding motion to a cutter' bar, and for imparting at the Vsame time rotary motion to the cutter bar about its own axis.

In such embodied lactuating or operating means for the Cutter bar, the bar ismounted in suitable holders or bearing blocks, which latter are -mounted in guideways spaced apart along the cutter bar, and are thereby adapted to take up the transverse stresses on the bar, and to maintain it in alinement. These holders or bearing blocks are drawn along and slide wit-hin the guideways, the cutterbar having connections which impart thereto the requisite' rotary motionabout its own axis by reason of its movement along its guldeway.. f

f Further, and more in detail, as embodied, thebearings or bearing blocks for the 'cutter bar are slid along their Vguicleways'"in both directions by means of aline foi-cable wound in onel direction upon a drum and unwound therefrom in the opposite direction, the `motion-being reversible `tofgive travel or advancement in either direction to the cutter bar. The shaft or shank of the cutter bar is provided with one or more sprocket wheels meshing with a sprocket chain, which Achain travels in the'opposite direction from the cutter bar, thereby imparting to the cut ter bar the necessary rapid yrotation about its own axis.

The path of travel of the cutter bar-is determined by the guideways. lVhatever the length or direction ofthe guideways,

the flexible controls for the cutter bar,"that is, the cable for advancingjthe bar' andthe chain for rotating the bar,re'adilyfaccommo date themselves to a guidewayrof any shape or length'. u l

In' accordance with certain features of the invention, the cutter bar and its actuating mechanism-arefeinbodied infamachine de-y fdownuponthe machine the undercuttine'.

The machine is preferably equipped with conveyors, which form very largely `the top of the machine yinside theframe, whereby as the Coal falls or is thrown down, it is automatically conveyed away. n u

More in detail to the present embodiment, the machine has'a flat'low frame withv a cutter chain running` around the outside thereof, making a bottom kerfv Orundercutting into whichthe frame ,is slid vto advance the cutter 'chain to its-work. The cutter bar is Vnested within this frameand enters'the undercut-y ting therewith, its =quideways'and operating;` means being mounted on the outside end of the frame. The machine has winding incz'ins toadvance it to its worl; either in forwardly or sidewise' direction.' i Y Other features of the invention will be set forth in connectionwith the following detailed description ofA the presentA embodiinent, and it --willbe understood that thep'receding statements are exemplary and eX- plicatory tion. y l

As 'previously stated, the invention in the and are not restrictive of the inven- V exemplified embodiment is appliedto a mavchine vadapted to .cutv a vbottoin'ler-f. the

frame of the inachinesliding into tthis-kerl or undercuttingfas rit is made, the top interior of the frame 'consisting prin'cipallvof beltjor apron conveyors which Vconvey away the brokendowncoalif Q L y In the embodied forima generalaframe l lis providethof general. rectangularv confor- 4-rnation-V and "provided with rounded corners.

thereinto.

Vmounted on the machine frame. y shaft 18 are two clutches 16 and l?, which fis loosely mountedon a sliai Y in bearings 25and 26,'1nountedon the ma- In the exterior vertical face of this frame is provided a guideway k2, in which guideway rims a cutter chain, provided with teeth t proportioned and arranged to cut a kerf of suilicient height that the frame l may slide ln the embodied form of driving mechanismV for the cutter chain 3 it is driven from a' motor 5, which motor is utilized for driving all parts on the machine. In the driving connections for the cutter-chain, a beveled gear wheel 10 islixed onone end of the shaftofthe motor 5. yMeshing therewith are twol beveled gear wheels 11 and '12 (Figs. 1, 2,A 5,' and '7), which gearwhe'els are loose on a shaft 18, journaledv in bearings 14' and l5, Splined on may be operated'to connect shaft 13 toV either of the drivenbeveled-gear,wheels 1l andV l2, whereby the shaft A13 may be driven in either direction.V 1 r f These clutches and the shaft i3, in yaddition to rproviding-a support for the gear wheels'll Vand l2, are utilizedto press or Vdrive the machine Yto thework by means of a suitable winding;- drum, as willbe lat-er explained. Fixed to beveled gear wheel 1l is a spur-gear wheel-20, and'A fixed to beveledgear wheel 12 is a spur-gear wheel 2l. Gear wheel 2O meshes with a gear wheel 23, which At 24, journaled chine frame. Gear wheel 2l meshes with a 'gear wheel v27, likewise loosely mounted on the shaft 24. l

-Splined on shaft 4is a double-jawed clutch 28,'adapt'edto engage with clutching devices on the spur gear n3, or alternativelyl v'xi-*ith .like clutching devices on the gear Wheel 27, to drive shaft 24 (Fig'sl t and 5) in either direction.V Fixed o iishaft 24 is a beveled gear wheel orl pinion-30,` meshing with a .beveled gear ringY Bl'formed or lixed on the top side of a horizontally disposed sprocket wheel 32 (Figs. land').

and putting-it on the other way about.

Viuiaie'cevices are ov'ce orl ressl fr Cl tl] ll y pi ildf pY inZD the machine to the worlnthesedevices in the iiesent embodiment operating` by means of winding 'cables x'vhic'h aire attached to suitdirection in `which the `machine is;4 to be drawn or travelled.l In the embodied form ofsaid means (Fig-s. 1,2, 4, 5, 7 andll) two wzritlirig"drunisOand 'fl-vl; are lined on a' shaft y Sprocket wheel k32 has its shaft 33 ]ournaled in bearings 34 r4 able 'anchors or screw-jacks positioned'in the or outer end,

42, journaled at 43 and 44 in bearings formed on the Vmachine frame. In the driving means therefor, a geared pinion 45'cis fixed on shaft 42, pinion 45 meshing with gear wheel 23,

f already described (Figs. 1,4, and 7). This provides for a drive of thedrums 40 and 41 in either direction. Y

Suitable guiding devices are provided for thecables from drums 40 and 41, such as idler pulleys 46, 47, 47a, 47D, and 48,V posif tioned at any suitable point on the machine. Pulley` 4,6 ismounted on a shaft 46V. vPulleys 4'7, 47?,and 47b are at the ii'oor level; pulley 4S is detacliably positioned bya pin in anyV one of a series of holes in the framel. rThe cable 52 running over these pulleys passes over the lower reaches of chains 162V and 163 and between the up per and vlower reaches'of the conveyor y60. In Fig. 14 jacks or anchors 49 and 50 are shown, likewise arranged at any suitable points, the cables 51 and 52being attached to theanchors, passing over the 'pulleys and being wound about the drums 40 and 41.. To avoid interference between the machineand the jacks or anchors, when` necessaryV the jacks aresecured in diagonal position be tween the top of the vein or seam and the side wall or rib` of the coal, the bottom of the jack being sufficiently high to permit of the cutter chain and frameof the machine passing beneath the jack without interference. )Vith the mechanism for reversing the direction of drive of the cutter chain, and of the winding means, and forreversingthe cutter chain itself, the machinerwill cut in any desired direction,y by positioning jacks wor anchors, to which winding cables are attached, so that the machine will be pulled by the cables in such direction. u Further, in the present embodied forni, the machine is equipped with a conveyor system,

occupying the greater part of the top of the fraine,"wliereby after the under; cutting has been made and the machine is in the undercutting, the under-cut coal when itl breaks down, or is'broken down, falls upon the conveyor or conveyorsand is automatically conveyed away by the machine.

In the embodied form (Figs. 1,4 and 14)` a longitudinal conveyor extends the entire length of the'right-hand side, and for `sub stantially half the `widthlof the machine. In Fig. .4 the top reach of the conveyorbeltsis broken away to show more clearly'the interior of the mechanism.` yThis conveyor 60 comprises an endless belt or apronrunning over an idler roller 61 (Fig. 4) journaled at 62 and 63 in the machine frame. A driving roller64 for the conveyor 60, is at` the other journaled at 65 and 66 in the machine frame.` p

The driving means rfor the foregoing (Figs. 1, 2, 4, v,Si and 11) comprise a'clutch veinher @Mixed te ashaft 68 (Figs, 4 and,

11) of the roller 64. Cooperating therewith is a vclutch member 69,'splined for longitudinal movement on a shaft 70, which shaft has one Vend j ourna-led within the clutch member 67, and is also journaled in bearings 71 and 72 mounted upon the machine frame. Coiled about shaft is a spring 7 3, in compression between the clutchmember 69, and the bearing 71, and pressing clutch member 69 into driving engagement with the clutch member 67. Theclutch maybe thrown off by means of a suitable yoked lever of the usual form (not shown) engaging with `an annular groove 74, formed in the hub of the clutch member V69 in theV usual manner. Y Shaft 701is driven bymeans of a geared pinion 77 fixed thereony andineshing with a gear wheel 78, fixedto gear wheel 2.7, which has already been described. e l p.

Referring now to vthe drive for the trans-` verse conveyor, which in the embodied form shownin Figs.V 1 and`4, is located at the upper left-hand part ofthe machine, the driving mechanism occupying the lower lefthand part. The mechanism. is best shown in Figs. 1 and 4, the drive being ,shown in the latter'iigure. This conveyor 84 runs over an idler roller`85, journaled .at 86 and 87 in the machine frame. At its opposite end, conveyor 84 runs over a driving roller 8S,- journaled at 89 and 90 inv theV machine.

irame. .n o. l

The driving means therefor comprises -a shaft 91 Ifor the roller 90 on ,which shaft is splined a clutch member 921. Clutch member 92 is spring pressed against a cooperating clutch member 93 by means of a spring 94 in compression ybetween the hub of clutch member 92 and a collar 95 fixedy on shaft 91. Shaft 91 is iournaled at its free end in a bearing 96. Clutch member 92may beV thrown on and off by an actuating lever of the usual type (not shown).I

Fixedto clutch member 93, which is loosev on shaft 91,1is a beveled gear 98 andrmeshinfr therewith is a beveled gear 99 which isl fast on a shaft 100.` Shaft 100 is journaled in bearings 101 and 102 mounted on the machine frame. Fixed alsoin shaft 100 is beveled gear '103, with `whichV meshes a beveled gear 104 mounted on a shaft 105.

The driving connections/for. shaft 105 will be later described, as they comprise a part of the drive for certain other Vmechanisms which will be later described..

The embodied means for 4cut-ting the `upper lerf, to separate the block, of coal, to cause it to either break dowirof its own weight, or to be vreadily broken down, and

with as'I the frame-travels into theundere cutting as the cutter lchain 2 cuts the bottoni .kerfjbe @utter harris, provided with for:` 'meansin' 'its shank is' journaled, the bearingy Vmeans ltraveling alonga multi-directionalor angled guidewy that is, a guidew'ayI "having reaches transversely disposed with respect` to each other, and' preferably'having' two `vertical side' lreaches and inyin'termediate top horizontal' 1each`, whereby Vthe" cutter lbar is ca# f ...pa'citated to cut an upwardly progressing vertical kerf, turning into a horizontal Vkerl at the top 'of' the vein, and then turning into a downwardly progressing'kerf toward the undercutting.

. Further, as embodied, the` mechanism for laterallyy advancing' orv feeding the cutter bar comprises Windingmeans which draw or slidevv the bearingmeans '1n whlch the shank of the 'y cutter barl is journaled i along the guideways, `just referredto, which determine the path of'travel kof thecutter bar.

As' herein embodied,`scables are attachedf'rom both directions to i ay pairfof bearing blocks, which blockskwork kor lslide in two separate' iguideways, spaced apart so as to Vance 30' preventfside f lash 'or' lexurel of the cutter,

bar, "the winding cables winding y'upon and ofil cfa drivenfdrum, the drum being reversible in itsdirecti'on of winding, to .ad-

A flie'cutter bar' along its pathway, in either direction. .n n y f Y.

In accordance withone feature of the invention, the means for imparting rotation to 'the' cutter bar about its own axis, comprises devices' operatingV wholly,or in part through, :or iniconjun'ction with, the bodily orf translational travel or feed of the cutter.

bar. 'As embodied," a` sprocketv wheelor other toothed wheel, or wheels, is fixed Vto the sha-ft of thecutt'er bar, and is in mesh or; engagement'with aQtoothed member eX- t'ended 'along'oradjacent to one, or preferably both',r of thelguideways for Athe cutter bar hearings. Specifically, 'as embodied, two sprocket wheels are fixed uponv the shaft or shank of" the 'cutter bar,` each of the sprock-y et'dfwheels meshing` with a ycorrespending sprocket chain, these chainstravelling inthe guidewayszin'an opposite direction to the direction oftravel of the cutter bar. V Thus,

rotary motion equalfto the sum of the for-' ward travel: of thecutte'rjbar and of the opposite or'rever'se travelof the sprocket chainsis impartedV to the cutter bar about its ownaxis. .e v A e v s .s vReferring detail tothe, specic ernbodied structure of the means for progressing-'ontravellingthe cutter'bar along its guidewa'y (lf`igfsl'-1,2,3:y

@genermovmntff-jtrans eisery* "te its axis; ,shaft lifeline-ated in tivo "bearing blo'cls 118 and 119, spaced apart along the shaft, as already described, and for 'the purposes stated.'` Shouldered b'ushingsi120l and Vferior and superior channels122 and 123 for the bearing block 1,8 and like channels 124 and ',125'for'the bearing block ,119.` These 'channels .are practically p, of Vthe yshape of a very broad inverted, U,4 as will be seen from Fi'gsi2, 12, and j .1 j A 1 f These guidethel cutter bar'in an angled or .bent path t`o make, an upwardly progressing verticalfkerf, a`tophorizontal kerf, and a downwardlyprogressing vertical kerf. The

vfirstof these three lizerfs starts out at the undercutting'v by reason' ofthe cutter bar benneA nested in 'the' frame 1, and the last offthemwill again connect v'with the under cutting',v unless the mass ofvcoal breaks off in the meantime. `The guidewaysvr are lpro,-l vided With crossbracing `126 between the channels 1221 and 125, and between the channe1s125 and 123. The bases of theseA guideway channels are firmly supported'upon and fastened tothe main frame of the machine.V

As' embodied,vv attached to thek bearing block 118 (Figs. 1, 4,' 6, 10, and 13) ateither sidetthereof, are the two ends of a cable 128` the'cablerunning through the guideway and the corners` ofthe guidewa-y acting krespectively'as guiding'shoes for the cable. The cable intermediatfely of itsatt-ached ends is wound-about a drum 134, so as to simultaneouslyfwind on and pay 'oil therefrom in either: 'one direction, or the other, dependent uponthe direction of rotation of the drum. Guiding pulleysl 135, .13.6, 137 andV 138, are shown Y for directing the A cablev betweenV the drum and the guideway. y v Y i l vDru"1n1134l is looselyfmounted upon ashaft 140, journaled" in bearings 141 and 142,fon themaehineframe., For the purpose-of` rot'a'tingjthe` drum`, fitted into one end of the drum is aconeclutch143f,jzsplined on shaft a' shaft' 145, 'and has an arm provided Mith a pinl engaging in yan a` I 1I'1i1l`ar-A groove the" "onel clutM 'lhisyleverV Shaft 140 is driven in a suitable manner and by any suitable connections.` As shown,

a worin wheel 148 is fixed on shaft 140 and meshing therewith isa worm 149, which is fixed on a vertical-shaft 150, journaled at 151 in the machine frame. Fixed also to shaft 150 is a spiral gear pinion152, with which meshes a spiral gear pinion 153, fixed on shaft 13, lpreviously described. This gives a driving connection operating in either direction fromthe motor 5 to the winding drum 184.

Referring now to the specific embodied details of mechanism for rotating` the cutter bar, embodying the features of invention already described or referred to, two sprocket wheels 160 and 161 are fixed lto shaft 117, preferably on the exterior sides of the bearing blocks 118 and 119. These two sprocket wheels mesh (Figs. 1, 9, 10, and 12) respectively with sprocket chains 162 and 163, the sprocket chains, respectively, running in guideways 164 and 165, formed within the channels 122 and 124.

The `sprocket chains, in accordance with one feature of the invention, are driven in the opposite direction from the direction of travel of the cutter bar while it Vis cutting the lrerf. n the embodied form of means for driving the sprocket chains, driving sprocket wheels 168 and 169,1nesh respectively with the sprocket chains 162 and 163 to drive the chains. The sprocket wheels 168 and 169 are fixed on a shaft 170, suit- 35 ably journaled in the machine frame in hearings 171 and 172. Fixed on shaft 170 is a pair of sprocket wheels 173 and 174, over which run sprocket chains 175 and 176. These chains run also over a pair of sprocket wheels177 and.17 9, fixed on the shaft 105, which has been previously described. Shaft 105 is journaled in bearings 180 and 181, mounted on the machine frame. Fixed on shaft 105 is a gear wheel 183, with which meshes a pinion 184, fixed on the shaft of motor 5.

1n the embodied form, the cutter bar 115 is nested at the right-hand side of the chine as shown in F igs. 1 and 4, the cutter bar and its shank passing downwardly within the frame 1, alongside the conveyor 60. When the cutter bar is operated it passes upwardly out of its position as described, to out the Vlrerf prescribed by its guideways, and then, by reversing the winding mechaism, the cutter bar is returned to its place within frame 1.

The invention in its broader aspects is not limited to the particular constructions and G0 arrangements herein shown and described, but departures may be made therefrom within the scope of the accompanying claims, without departing from the principles of the invention and without sacrificing its chief advantages.

1. vA mining Lmachine including` inv combination a low, flat frame, a cutting chain extending therearound, a cutter bar nested therein, an angled guideway for guiding the cutter bar in a bent path, means for rotating the cutter bar, and means for impelling the cutter bar along the guideway.

2. A mining machine including in combination a low, flat frame, a cutting chain extending therearound, a cutter bar nested therein, a guideway for guiding the cutter bar upwardly, transversely and downwardly, means 'for impelling the cutter bar along its guideway, and means for rotating the cutter bar.

3. A mining machine including in combination a low, .flat frame, a cutting' chain eX- tending therearound, a cutter bar'nested thcrei i, an angled guideway for guiding B5 the cutter bar in a bent path, means including a driving chainV traveling along the guiclewa'y for rotatingthe cutter' bar, and means for impelling the cutter bar along the guideway.

4. A mining machine including in combination a low, flat frame, a cutting chain extending therearound, a cutter bar nested therein, a guideway for guiding the cutter bar upwardly, transversely and downwardly, means for impelling the cutter bar along its guideway, and means including a ydriving chain traveling along the guideway for rotating the cutter bar.

5. A mining machine includingv in coinbination a low flatfram'e, a guide-way for a cutter bar, having two vertical reachesand a horizontal reach connecting the two vertical reaches, a cutter bar movable up one vertical reach of the guideway, across the 105 horizontal reach and down the other vertical reach, a power driven chain travelling up one vertical reach of the guideway, across the horizontal reach and down the other vertical reach of the guideway, for rotating the cutter bar, and means for moving the mining machine bodily sidewise for pressing the cutter bar to the work.

6. A mining machine including in combination a llow fiat frame, a guideway for a 11'-,

cutter bar, havingtwo vertical reaches and a horizontal reach connecting the two vertical reaches, a cutter bar movable up one vertical reach of the guideway, across the horizontal reach and down the other vertical reach, a power driven chain travelling up one vertical reach of the guideway, across the horizontal reach and down the other vertical reach of the guideway, for rotating the cutter bar, and means travelling in 32 the said guideway and connected to the. cutter bar for moving it bodily sidewise to press it to the work. Y

7. A mining machine including in combination a low flat frame, a guideway for a V CII ' terba-r, having twovertical-ry reaches and a f cutter bar, having two verticalreaches and a horizontalf'reach connecting' ,the two vertical reaches, a cutter-bar movable up one vertical -reach ,ofl the -gu-ideway, Vacross the :horizontal reach and down the other vertical;(reach,a lpower "driven, chain travelling up one-vertical reach otutherguideway, across the-horizontalreach anddown thexother vertical reach' of the guidewa for rotating thercutter "bar,` means for moving'rthle lwhole mining inachinefbodily forcpressingvthe cutter' bar to the work, and flexible, power drivenmeans-travelling in said guideway `for pressing the cutter bar to the work. ,o Y l 8. A mining machine includingin vcombination aflowflat -rame,` acutting chain 'eX- tendingtherearound a guidewavfor a cuthorizontal'reach connecting the two verticalfreachfes al cutter 'bar` movable up one vertical 'reach of; the guijdew ay,-across the horizontalpre'ach and down the other vertical reach", Va powerdriven-chzfill' travelling up one vertical reach of the gudeway, across the horizontal reach and down the other vertical reach ofthe guidewayzfor rotating the cutter bar, andmeans for moving the lmining rn-achin'eI bodily sidewise i for pressingthe c utter bar tothe work@y SQA. mining-machine"including in combinationfa low flat frame,- a cuttingchain extending therearound, a guideway for across the horizontalr reach and down f the other vertical reach," a power driven e'h'ain travelling up onevertical reach of the guideway, across the horizontalreach and downthe other vertical reach of the guide- Way for rotating the cutter bar', andmeans travelling in the said guideway and connected to the cutter bar for moving it bodily sidewisje to press it to the work.l

1 0, A mining machine including in combination a low'. flat frame, a cutting chain extending therearound, a guideway"v for a cutter'ba'r, having two vertical reaches and a horizontal reach connecting the 'two vertcalreaches, a. cutter bar movable up' one vertical reach of the guidew'ay, across the horizontal reach and down the othervertical reach, a power` driven chain travelling up one `ve-rticalreach of the-'guidewayyacross the horizontal reach and down` thev other vertical reach of the-guidewa'y,- for rotating thecutter bar, -means f for moving the whole miningffmachinebodily for pressing the"cutter'bar to the work, and flexible, power driven means, travelling insaid'guideway, for pressing Ythe cutter bar yto Ythe work.

vIn testimony whereof, name to this specification.

' f RICHARD IDEALE.

I have signed my Y 

